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nl80211: add an option to allow MFP without requiring it

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The user space can now allow the kernel to associate to an AP that
requires MFP or that doesn't have MFP enabled in the same
NL80211_CMD_CONNECT command, by using a new NL80211_MFP_OPTIONAL flag.
The driver / firmware will decide whether to use it or not.

Include a feature bit to advertise support for NL80211_MFP_OPTIONAL.
This allows new user space to run on old kernels and know that it
cannot use the new attribute if it isn't supported.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach
2017-08-18 15:31:41 +03:00
committed by Johannes Berg
vanhempi a6bcda4484
commit 65026002d6
2 muutettua tiedostoa jossa 18 lisäystä ja 3 poistoa
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8
net/wireless/nl80211.c
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@@ -8952,8 +8952,14 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_USE_MFP]) {
connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
if (connect.mfp == NL80211_MFP_OPTIONAL &&
!wiphy_ext_feature_isset(&rdev->wiphy,
NL80211_EXT_FEATURE_MFP_OPTIONAL))
return -EOPNOTSUPP;
if (connect.mfp != NL80211_MFP_REQUIRED &&
connect.mfp != NL80211_MFP_NO)
connect.mfp != NL80211_MFP_NO &&
connect.mfp != NL80211_MFP_OPTIONAL)
return -EINVAL;
} else {
connect.mfp = NL80211_MFP_NO;